Datasheet

AD9251
Rev. A | Page 4 of 36
SPECIFICATIONS
DC SPECIFICATIONS
AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate, 2 V p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS,
DCS disabled, unless otherwise noted.
Table 1.
Parameter Temp
AD9251-20/AD9251-40 AD9251-65 AD9251-80
Unit Min Typ Max Min Typ Max Min Typ Max
RESOLUTION Full 14 14 14 Bits
ACCURACY
No Missing Codes Full Guaranteed Guaranteed Guaranteed
Offset Error Full ±0.1 ±0.70 ±0.1 ±0.50 ±0.1 ±0.70 % FSR
Gain Error
1
Full −1.5 −1.5 −1.5 % FSR
Differential Nonlinearity (DNL)
2
Full ±0.60 ±0.75 ±0.70 LSB
25°C ±0.3 ±0.45 ±0.45 LSB
Integral Nonlinearity (INL)
2
Full ±1.75 ±1.75 ±2.50 LSB
25°C ±0.6 ±0.6 ±1.0 LSB
MATCHING CHARACTERISTICS
Offset Error 25°C ±0.0 ±0.65 ±0.0 ±0.65 ±0.0 ±0.65 % FSR
Gain Error
1
25°C ±0.2 ±0.2 ±0.2 % FSR
TEMPERATURE DRIFT
Offset Error Full ±2 ±2 ±2 ppm/°C
INTERNAL VOLTAGE REFERENCE
Output Voltage (1 V Mode) Full 0.981 0.993 1.005 0.981 0.993 1.005 0.981 0.993 1.005 V
Load Regulation Error at 1.0 mA Full 2 2 2 mV
INPUT-REFERRED NOISE
VREF = 1.0 V 25°C 0.98 0.98 0.98 LSB rms
ANALOG INPUT
Input Span, VREF = 1.0 V Full 2 2 2 V p-p
Input Capacitance
3
Full 6 6 6 pF
Input Common-Mode Voltage Full 0.9 0.9 0.9 V
Input Common-Mode Range Full 0.5 1.3 0.5 1.3 0.5 1.3 V
REFERENCE INPUT RESISTANCE Full 7.5 7.5 7.5 kΩ
POWER SUPPLIES
Supply Voltage
AVDD Full 1.7 1.8 1.9 1.7 1.8 1.9 1.7 1.8 1.9 V
DRVDD Full 1.7 3.6 1.7 3.6 1.7 3.6 V
Supply Current
IAVDD
2
Full 36.5/49.5 39.4/52.8 69.0 72.9 80.5 85.5 mA
IDRVDD
2
(1.8 V) Full 3.4/5.6 8.4 10.3 mA
IDRVDD
2
(3.3 V) Full 6.3/10.6 16.0 19.5 mA
POWER CONSUMPTION
DC Input Full 66/89 125 145 mW
Sine Wave Input
2
(DRVDD = 1.8 V) Full 71.8/99 77.0/105.5 139.0 146.5 163.4 173 mW
Sine Wave Input
2
(DRVDD = 3.3 V) Full 86.5/124 176.7 209 mW
Standby Power
4
Full 37 37 37 mW
Power-Down Power Full 2.2 2.2 2.2 mW
1
Measured with 1.0 V external reference.
2
Measured with a 10 MHz input frequency at rated sample rate, full-scale sine wave, with approximately 5 pF loading on each output bit.
3
Input capacitance refers to the effective capacitance between one differential input pin and AGND.
4
Standby power is measured with a dc input and the CLK active.